Lucene3.3、Lucene3.4中文分词——庖丁解牛分词实例

如果是Lucene3.0以上版本首先我们需要下载庖丁解牛最新源码并生成jar文件，我已经将最新源码和jar文件上传了：http://download.csdn.net/detail/a_2cai/3671164 ，可以下载，或者下载一个SVN客户端从http://code.google.com/p/paoding/检出最新的trunk源码，本地编译下。
当我们有了最新的庖丁解牛分词包和lucene3.3或Lucene3.4即可以运行以下示例：（我已将源码和使用到的文件以及生成的索引文件上传了：http://download.csdn.net/detail/a_2cai/3671272）

为了简单起见我建了一个txt文件：内容如下（就如一个数据库的不同条目）

172.7.14.198::172.7.19.71::DS-2DF1-4010020090611AACH290005648WC::移动侦测::2011/9/1172.7.14.198::172.7.24.51::DS-9016HF-S1620100809BBRR401273372WCVU::移动::2011/9/1172.7.14.198::172.7.24.51::DS-9016HF-S1620100809BBRR401273372WCVUC::移动侦测::2011/9/1172.7.14.198::172.7.19.71::DS-2DF1-4010020090611AACH290005648WC::Lucene测试::2011/9/1172.7.14.198::172.7.19.71::遮挡一下::遮挡报警::2011/9/1172.7.14.198::172.7.19.71::遮经挡报警::遮挡报警::2011/9/1172.7.14.198::172.7.19.71::多域测试::移动侦测::2011/9/1172.7.14.198::172.7.19.71::多域测试::移动侦测::2011/9/1172.7.14.198::172.7.19.71::DS-2DF1-4010020090611AACH290005648WC::移动侦测::2011/9/1172.7.14.198::172.7.24.51::DS-9016HF-S1620100809BBRR401273372WCVU::磁盘已满::2011/8/31172.7.14.198::172.7.19.71::DS-2DF1-4010020090611AACH290005648WC::移动侦测::2011/9/1172.7.14.198::172.7.19.71::DS-2DF1-4010020090611AACH290005648WC::移动侦测::2011/9/1172.7.14.198::172.7.24.51::DS-9016HF-S1620100809BBRR401273372WCVU::移动::2011/9/1172.7.14.198::172.7.24.51::DS-9016HF-S1620100809BBRR401273372WCVUC::移动侦测::2011/9/1172.7.14.198::172.7.19.71::DS-2DF1-4010020090611AACH290005648WC::Lucene测试::2011/9/1172.7.14.198::172.7.19.71::DS-2DF1-4010020090611AACH290005648WC::遮挡报警::2011/9/1172.7.14.198::172.7.19.71::DS-2DF1-4010020090611AACH290005648WC::移动侦测指的是将一个汉字序列切分成一个一个单独的词::2011/9/1172.7.14.198::172.7.24.51::DS-9016HF-S1620100809BBRR401273372WCVU::查询方式总体来讲分两类：查询API查询和语法查询::2011/8/31172.7.14.198::172.7.24.51::DS-9016HF-S1620100809BBRR401273372WCVU::对于查询时的Field名一定要大小写对应，默认情况下要查询的关键字要转成小写，这在lucene建索引的时候做过特殊处理::2011/8/31
建索引：

public static void testIndex() throws Exception{
String itemFilePath = "TestDocs/luceneDemoTest.txt";
boolean isCreate = false;
Date start = new Date();
try {
System.out.println("Indexing to directory '" + indexFilePath + "'...");

Directory dir = FSDirectory.open(new File(indexFilePath));
//Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_33);
//Analyzer analyzer = new PaodingAnalyzer("etc/paoding-analysis-default.properties");
//Analyzer analyzer = new PaodingAnalyzer("F:/paodingetc/paoding-analysis-default.properties");
//Analyzer analyzer = new PaodingAnalyzer("ifexists:paoding-dic-home.properties");
Analyzer analyzer = new PaodingAnalyzer();
IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_33,
analyzer);

if (isCreate) {
//创建新索引删除旧索引
iwc.setOpenMode(OpenMode.CREATE);
} else {
// 向索引中添加新的Document
iwc.setOpenMode(OpenMode.CREATE_OR_APPEND);
}
// iwc.setRAMBufferSizeMB(256.0);

IndexWriter writer = new IndexWriter(dir, iwc);
FileInputStream fis;
try {
fis = new FileInputStream(itemFilePath);
} catch (FileNotFoundException fnfe) {
return;
}
try {
//new BufferedReader();

BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(fis, "UTF-8"));
String item = "";
String[] fields;
item = bufferedReader.readLine();
Integer id = 0;
while(!"".equals(item) && item != null) {
id++;
fields = item.split("::");

// 创建空文档
Document doc = new Document();
//                  NumericField idField = new NumericField("ID", Field.Store.YES, true);
//                  idField.setIntValue(id);
//                  doc.add(idField);
doc.add(new Field("ID", id.toString(),Field.Store.YES, Field.Index.NO));
doc.add(new Field("IDSTR", id.toString(),Field.Store.YES, Field.Index.NOT_ANALYZED));//不分词索引，其实没必要索引为了测试所以索引

NumericField idField = new NumericField("IDNUM", Field.Store.YES, true);
idField.setIntValue(id);
doc.add(idField);//用于测试数字

doc.add(new Field("PCIP", fields[0],Field.Store.YES, Field.Index.ANALYZED));

doc.add(new Field("DeviceIP", fields[1],Field.Store.YES, Field.Index.ANALYZED));

doc.add(new Field("DeviceSerialNum", fields[2],Field.Store.YES, Field.Index.ANALYZED));

doc.add(new Field("AlarmType", fields[3],Field.Store.YES, Field.Index.ANALYZED));

//一个域可以有子集
doc.add(new Field("MultiFields", fields[2],Field.Store.YES, Field.Index.ANALYZED));
doc.add(new Field("MultiFields", fields[3],Field.Store.YES, Field.Index.ANALYZED));

NumericField alarmDatetime = new NumericField("alarmDatetime", Field.Store.YES, true);
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy/MM/dd");
alarmDatetime.setLongValue(simpleDateFormat.parse(fields[4]).getTime());
doc.add(alarmDatetime);

if (id == 5) {
doc.setBoost(1.2f);
}

if (writer.getConfig().getOpenMode() == OpenMode.CREATE) {
writer.addDocument(doc);
} else {
writer.updateDocument(new Term("ID" , id.toString()),
doc);
}
item = bufferedReader.readLine();
}

} finally {
fis.close();
}

//writer.optimize();//优化索引

writer.close();

Date end = new Date();
System.out.println(end.getTime() - start.getTime()
+ " total milliseconds");

} catch (IOException e) {
System.out.println(" caught a " + e.getClass()
+ "\n with message: " + e.getMessage());
}
}

检索：

public static void testSearch() throws Exception{
String field = "AlarmType";
boolean raw = false;
String queryString = "移动";
int hitsPerPage = 10;

IndexSearcher searcher = new IndexSearcher(FSDirectory.open(new File(indexFilePath)));
//Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_33);
//Analyzer analyzer = new PaodingAnalyzer();

BufferedReader in = null;
//QueryParser parser = new QueryParser(Version.LUCENE_33, field, analyzer);

//Query query = parser.parse(queryString.trim());
Query query = new TermQuery(new Term(field,"查询"));
System.out.println("Searching for: " + query.toString(field));
// Collect enough docs to show 5 pages
TopDocs results = searcher.search(query, 5 * hitsPerPage, Sort.RELEVANCE);
ScoreDoc[] hits = results.scoreDocs;
int numTotalHits = results.totalHits;
System.out.println(numTotalHits + " total matching documents");
for (int i = 0; i < hits.length; i++) {
Document doc = searcher.doc(hits[i].doc);
System.out.println("ID:" + doc.get("ID") + "\tPCIP:" + doc.get("PCIP") + "\tDeviceIP:" + doc.get("DeviceIP")
+ "\tDeviceSerialNum:" + doc.get("DeviceSerialNum") + "\tAlarmType:" + doc.get("AlarmType")
+ "\tAlarmDatetime:" + new Date(Long.parseLong(doc.get("alarmDatetime"))).toString());
}
}

以上为建索引和检索的简单实例，大家可以下载源码运行调试下，对于初接触的人使用会有帮助的。Demo源码以及相关配置信息见eclipse工程：http://download.csdn.net/detail/a_2cai/3671272